Curved light-guide optics for LED street lighting

1. A streetlight luminaire comprising:

a curved light guide plate including:

a first receiving surface;

an emitting surface;

a major surface opposing the emitting surface;

second and third receiving surfaces on a streetside of the streetlight luminaire and an opposing house side of the streetlight luminaire, respectively, the first receiving surface extending in a first dimension between the major surface and the emitting surface, the first receiving surface, the emitting surface, and the major surface extending in a second dimension between the second and third receiving surfaces, the first dimension perpendicular to the second dimension, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) in the first dimension and the second and third receiving surfaces including an infinite radius of curvature in the first and second dimensions; and

a plurality of LEDs positioned to emit light into three or more of the first receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.

2. The streetlight luminaire of claim 1 , wherein the first receiving surface, fourth receiving surface, emitting surface, and major surface are symmetric about a first axis longitudinally bisecting the emitting surface.

3. The streetlight luminaire of claim 1 , wherein the emitting surface and major surface include two portions with different, non-zero radius of curvatures in the second dimension.

4. The streetlight luminaire of claim 1 , wherein light emitted out the emitting surface provides a generally rectangular light distribution.

5. The streetlight luminaire of claim 1 , further comprising light diffusing features on the major surface.

6. The streetlight luminaire of claim 5 , wherein the diffusing features include Gaussian dots distributed on the major surface.

7. The streetlight luminaire of claim 5 , wherein the light diffusing features are epoxy dots distributed on the major surface.

8. The streetlight luminaire of claim 5 , wherein the light diffusing features diffuse an incident light ray along a direction of the incident light ray and provide a half width, half maximum (HWHM) light spread of between about 6 and 18 degrees centered around the direction of the impinging light ray.

9. The streetlight luminaire of claim 5 , wherein the light diffusing features are printed or molded on the major surface.

10. The streetlight luminaire of claim 1 , further comprising wherein a light emission from the emitting surface provides a distribution peak angle that is variable relative to a horizontal angle.

11. A streetlight lighting system, comprising:

a curved light guide plate including:

a first receiving surface;

an emitting surface;

a major surface opposing the emitting surface;

second and third receiving surfaces on a streetside of the curved light guide plate and an opposing house side of the curved light guide plate, respectively, the first receiving surface extending in a first dimension between the major surface and the emitting surface, the first receiving surface, the emitting surface, and the major surface extending in a second dimension between the second and third receiving surfaces, the first dimension perpendicular to the second dimension, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) in the first dimension and the second and third receiving surfaces including an infinite radius of curvature in the first and second dimensions;

a plurality of LEDs positioned to emit light into three or more of the first receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface;

a reflective surface positioned to direct all light transmitted through the major surface towards the emitting surface; and

a light emitting diode (LED) controller electrically coupled to the plurality of LEDs.

12. The streetlight lighting system of claim 11 , wherein the first receiving surface, fourth receiving surface, emitting surface, and major surface are symmetric about a first axis longitudinally bisecting the emitting surface.

13. The streetlight lighting system of claim 11 , wherein the emitting surface and major surface include two portions with different, non-zero radius of curvatures in the second dimension.

14. The streetlight lighting system of claim 11 , wherein light emitted out the emitting surface provides a generally rectangular light distribution.

15. The streetlight lighting system of claim 11 , further comprising light diffusing features on the major surface.

16. The streetlight lighting system of claim 15 , wherein the diffusing features include Gaussian dots distributed on the major surface.

17. The streetlight lighting system of claim 15 , wherein the light diffusing features are epoxy dots distributed on the major surface.

18. The streetlight lighting system of claim 15 , wherein the light diffusing features are printed or molded on the major surface.

19. The streetlight lighting system of claim 11 , wherein the light diffusing features diffuse an incident light ray along a direction of the incident light ray and provide a half width, half maximum (HWHM) light spread of between about 6 and 18 degrees centered around the direction of the impinging light ray.

20. The streetlight lighting system of claim 11 , further comprising wherein a light emission from the emitting surface provides a distribution peak angle that is variable relative to a horizontal angle.